Coated refractory composition and method for making the same

Details Coated refractory composition and method for making the same Coated refractory composition and method for making the same

1990-12-07

1993-09-28

Epstein, Henry F.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428220, 428323, 428325, 428329, 428402, 428403, 428699, 428702, 501123, 501125, B32B 900

Patent

active

052485579

ABSTRACT:
A composition comprising an alpha alumina substrate having a first coating layer of calcium pyrophosphate and a second coating layer of hydrous alumina, and to a calcined composition comprising an alpha alumina substrate having a first coating layer of calcium pyrophosphate and a second coating layer of a densified anhydrous, crystalline form of alumina and to a method for preparing the same.

REFERENCES:
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patent: 3793055 (1974-02-01), Shodai et al.
patent: 3885978 (1975-05-01), Doi et al.
patent: 3925575 (1975-12-01), Church et al.
patent: 3946134 (1976-03-01), Sherman
patent: 3989872 (1976-11-01), Ball
patent: 4110492 (1978-08-01), Hayman
patent: 4126474 (1978-11-01), Talley et al.
patent: 4144074 (1979-03-01), Itoh et al.
patent: 4357382 (1982-11-01), Lambert et al.
patent: 4375496 (1983-03-01), Nowakowski et al.
patent: 4657784 (1987-04-01), Olson
patent: 4975314 (1990-12-01), Yano et al.
"Advanced Inorganic Chemistry", Cotton et al., Wiley & Sons, 4th ed., 1980, p. 474.

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